In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for ...

While often forgotten about, air ducts are an essential part of efficient and healthy air flow in your home. In order for your HVAC system to do its job, the air ducts need to be free of dust and ...

Air duct leakage should be a concern to both the designer and the building owner because of its potential impact on initial construction costs, energy usage, and system performance. Every duct system ...